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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Long-lived nanosecond spin coherence in high-mobility 2DEGs confined in double and triple quantum wells

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Author(s):
Ullah, S. [1] ; Gusev, G. M. [1] ; Bakarov, A. K. [2, 3] ; Hernandez, F. G. G. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Fis, Caixa Postal 66318, BR-05315970 Sao Paulo, SP - Brazil
[2] Inst Semicond Phys, Novosibirsk 630090 - Russia
[3] Novosibirsk State Univ, Novosibirsk 630090 - Russia
Total Affiliations: 3
Document type: Journal article
Source: Journal of Applied Physics; v. 119, n. 21 JUN 7 2016.
Web of Science Citations: 8
Abstract

We investigated the spin coherence of high-mobility two-dimensional electron gases confined in multilayer GaAs quantum wells. The dynamics of the spin polarization was optically studied using pump-probe techniques: time-resolved Kerr rotation and resonant spin amplification. For double and triple quantum wells doped beyond the metal-to-insulator transition, the spin-orbit interaction was tailored by the sample parameters of structural symmetry (Rashba constant), width, and electron density (Dresselhaus linear and cubic constants) which allow us to attain long dephasing times in the nanoseconds range. The determination of the scales, namely, transport scattering time, single-electron scattering time, electron-electron scattering time, and spin polarization decay time further supports the possibility of using n-doped multilayer systems for developing spintronic devices. Published by AIP Publishing. (AU)

FAPESP's process: 09/15007-5 - Magnetic dynamics in semiconductor nanocrystals
Grantee:Felix Guillermo Gonzalez Hernandez
Support type: Regular Research Grants
FAPESP's process: 13/03450-7 - The spin Hall effect in semiconductors
Grantee:Felix Guillermo Gonzalez Hernandez
Support type: Regular Research Grants
FAPESP's process: 14/25981-7 - Generating and mapping spin currents with space and time resolution
Grantee:Felix Guillermo Gonzalez Hernandez
Support type: Regular Research Grants